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Modern Electronics Technique

Applications of Verifiable Encryption in Network Security

Hongbin Liang

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

Fair exchange is important in the increasing development of network dealing.Verifiable encryption is one of the basic of fair exchange protocol.This paper presents verifiable encryption and the definition of security,and describes the related cryptographic tools.Finally,the efficient verifiable encryption scheme is discussed.It is crucial to develop verifiable encryption for fair exchange in network.

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Computer Engineering and Applications Journal•Jan 1, 2008•1 citation
Fair exchange is important in the increasing development of network dealing.Verifiable encryption is one of the basic of fair exchange protocol.This paper presents verifiable encryption and the definition of security,and describes the related cryptographic tools.Finally,the efficient verifiable encryption scheme is discussed.It is crucial to develop verifiable encryption for fair exchange in network.
As more and more electronic transactions are being conducted on the IN TERNET, fair exchange protocol is becoming more and more important. Verifiable e ncryption is introduced as a primitive that can be used to build extremely effic ient fair exchange protocols where the items exchanged represent digital signat ures. In this paper, new verifiable encryption schemes are presented, and based on this scheme, a blinded verifiable encryption is presented. They are advantage ous over previous schemes in that they are more efficient and practical.
Fairness is the basic requirement of E-Commerce protocols. RSA is one of the most widely used cryptosystems. A fair-exchange protocol allows two parties to exchange items in a fair way so that either each party gets the other's item, or neither party does. In this paper construction and architecture of the existing fair exchange protocols are analyzed. Both practicality and efficiency problems of these protocols are also presented. Based on this analysis, an optimistic fair exchange protocol totally based on RSA signature scheme is proposed. The novel scheme employs verifiably encrypted RSA signatures in the extended integer ring that is elaborately constructed. The security and efficiency of the newly devised scheme are also proved and examined. It is showed that the proposed scheme is secure and efficient.
Based on the verifiably encrypted signature scheme without random oracles recently proposed by Gorantla et al.,a new scheme of optimistic fair exchange of digital signatures is proposed in this paper.The two players firstly exchange their verifiably encrypted signature on agreed-upon messages then their ordinary signature after the verification of each other's verifiably encrypted signature.If one of them executes the protocol dishonestly,the other can resort to a trusted third party so as to get the purpose of fair exchange of signatures.The proposed scheme has properties of short signature,low computation and verification cost.It can realize exchange of digital signatures fairly and efficiently.